/*
 * 功能描述：上传图片工具类
 */

package com.yjf.ljr.util;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLDecoder;
import java.util.UUID;

import android.util.Log;

import com.yjf.ljr.common.CommonData;

public class UploadImage {
	private static final String TAG = "uploadFile";
	private static final int TIME_OUT = 10 * 1000; // 超时时间
	private static final String CHARSET = "utf-8"; // 设置编码

	/**
	 * android上传文件到服务器
	 * 
	 * @param file
	 *            需要上传的文件
	 * @param RequestURL
	 *            请求的rul
	 * @return 返回响应的内容
	 */
	public static String uploadFile(File file, String RequestURL) {
		StringBuilder result = new StringBuilder();
		String BOUNDARY = UUID.randomUUID().toString(); // 边界标识 随机生成
		String PREFIX = "--", LINE_END = "\r\n";
		String CONTENT_TYPE = "multipart/form-data"; // 内容类型

		try {
			URL url = new URL(RequestURL);
			HttpURLConnection conn = (HttpURLConnection) url.openConnection();
			conn.setReadTimeout(TIME_OUT);
			conn.setConnectTimeout(TIME_OUT);
			conn.setDoInput(true); // 允许输入流
			conn.setDoOutput(true); // 允许输出流
			conn.setUseCaches(false); // 不允许使用缓存
			conn.setRequestMethod("POST"); // 请求方式
			if (RequestURL.indexOf("?") > 0) {
				String sign = RequestURL.substring(RequestURL.indexOf("?") + 1);
				try {
					sign = URLDecoder.decode(sign, "utf-8");
				} catch (UnsupportedEncodingException e) {
					e.printStackTrace();
				}
				String signMD5 = Base64.encode(HMacMD5.getHmacMd5Byte(CommonData.MD5KEY, sign));
				conn.addRequestProperty("sign", signMD5);
//				conn.addRequestProperty("machinekey", SplashActivity.mMachineKey);
			}
			conn.setRequestProperty("Charset", CHARSET); // 设置编码
			conn.setRequestProperty("connection", "keep-alive");
			conn.setRequestProperty("Content-Type", CONTENT_TYPE + ";boundary="
					+ BOUNDARY);

			if (file != null) {
				/**
				 * 当文件不为空，把文件包装并且上传
				 */
				DataOutputStream dos = null;
				try {
					dos = new DataOutputStream(conn.getOutputStream());
				} catch (Exception e) {
					return null;
				}
				StringBuffer sb = new StringBuffer();
				sb.append(PREFIX);
				sb.append(BOUNDARY);
				sb.append(LINE_END);
				/**
				 * 这里重点注意： name里面的值为服务器端需要key 只有这个key 才可以得到对应的文件
				 * filename是文件的名字，包含后缀名的 比如:abc.png
				 */

				sb.append("Content-Disposition: form-data; name=\"img\"; filename=\""
						+ file.getName() + "\"" + LINE_END);
				sb.append("Content-Type: application/octet-stream; charset="
						+ CHARSET + LINE_END);
				sb.append(LINE_END);
				dos.write(sb.toString().getBytes());
				InputStream is = new FileInputStream(file);
				byte[] bytes = new byte[1024];
				int len = 0;
				while ((len = is.read(bytes)) != -1) {
					dos.write(bytes, 0, len);
				}
				is.close();
				dos.write(LINE_END.getBytes());
				byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINE_END)
						.getBytes();
				dos.write(end_data);
				dos.flush();
				/**
				 * 获取响应码 200=成功 当响应成功，获取响应的流
				 */
				int res = conn.getResponseCode();
				Log.i(TAG, "response code:" + res);
				if (res == 200) {
					Log.i(TAG, "request success");
					InputStream input = conn.getInputStream();
					String readline = "";
					try {
						BufferedReader br = new BufferedReader(new InputStreamReader(input, "UTF-8"));

						while ((readline = br.readLine()) != null) {
							result.append(readline).append("\n");
						}
						// br.close();
					} catch (IOException ie) {
						System.out.println("converts failed.");
					}
//					byte[] data = new byte[1024];sss
//					int ss;
//					while ((ss = input.read(data)) != -1) {
//						result += new String(data, 0, ss);
//					}
					Log.i(TAG, "result : " + result);
				} else {
					Log.e(TAG, "request error");
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return result.toString();
	}
}
